Cutting knife

ABSTRACT

A disposable cutting knife having a molded plastic handle which tightly holds an insertable cutting blade in assembled position. One of the opposed side walls engaging a flat side of the blade provides a lug which is received in an aperture of the blade. The top surface of the lug forms an upwardly inclined ramp and the opposed side walls of the handle are laterally lanced to provide a sufficient resilience to allow a rigid blade to pass over the lug for insertion.

United States Patent Riley Aug. 15, 1972 CUTTING KNIFE 1,940,855 12/1933 Friedman ..30/339 X Inventor: Terence Riley, Shefi-leld, En-

Ogden l g and Primary Examiner-Theron E. Condon [73] Asstgnee: The Stanley Works, New Britain, Assistant Examiner-J. C. Peters Conn- AttorneyPrutzman, Hayes, Kalb & Chilton [22] Filed: Nov. 16, 1970 [57] ABSTRACT [2]] Appl. No.2 89,654

A disposable cutting kmfe having a molded plastic handle which tightly holds an insertable cutting blade 1 fl" pp in assembled position. One of the opposed side walls Nov. l8, I969 Great Britain ..56,28l/69 engaging a Side of the blade Phwides "8 which is received in an aperture of the blade. The top sur- 52 us. Cl ..3o/339 face of the lug forms an p y inclined p and s1 rm. Cl. ..B26b 5/00 the pp Side walls of the handle are laterally [58] Field of Search ..30/329, 339, 335,336 lanced to Provide a Sufficient resilience to allow a rigid blade to pass over the lug for insertion. [56] References 3 Claims, 4 Drawing Figures UNITED STATES PATENTS Stuart ..30/339 X Patented Aug. 15, 1972 3,683,498

FIG.I FIG.3 F|G.2 FIG.4

INVENTOR TERENCE GERALD RILEY ATTORNEYS CUTTING KNIFE This invention provides a cutting knife comprising a blade and a blade holder or handle wherein the blade fits tightly between opposed side walls of a blade retaining pocket at a forward end of the holder and a projection fonned on one of said walls locates in an opening in the blade to prevent the blade from being withdrawn from the pocket.

The invention will now be described by way of an example with reference to the accompanying drawings in which:

FIG. 1 is a view from one side of a disposable cutting knife;

FIG. 2 is a view of the knife from the other side; and

FIGS. 3 and 4 are views in the direction of arrows A and B of FIG. 1 respectively.

The knife comprises a blade holder 1 of synthetic plastics material, and a blade 2. At its forward end the holder has a blade retaining pocket 3 defined by side walls 4, 4a and 5, and a lug projection 6 is formed on wall 4 to locate in a complementary opening 7 in the blade. The blade has a tight fit between opposed side walls 4 and 5, but as shown in the drawing, the opposed side walls 4 and 5 are laterally lanced so that they are sufficiently resilient, when assembling the knife by sliding or inserting the blade into the pocket, to permit the rear end 8 of the blade to slide over lug 6, which slopes upwardly from front to back, until the lug is located in opening 7, but when thus located, the blade cannot be withdrawn from the opening.

What is claimed is:

l. A cutting knife comprising a molded plastic handle having a blade receiving pocket at its forward end with one of the opposed side walls of the pocket having a lug, and a rigid blade tightly received in the pocket with the lug positioned in an aperture of the blade, the opposed side walls of the handle being resilient to accommodate the passage of the blade over the lug for insertion.

2. The cutting knife of claim 1 wherein the side walls are laterally lanced to provide the resilience for receiving the blade and to tightly engage the blade after insertion.

3. The cutting knife of claim 2 wherein the upper surface of the lug forms an upwardly sloping ramp to facilitate the assembly of the blade and the blade holder. 

1. A cutting knife comprising a molded plastic handle having a blade receiving pocket at its forward end with one of the opposed side walls of the pocket having a lug, and a rigid blade tightly received in the pocket with the lug positioned in an aperture of the blade, the opposed side walls of the handle being resilient to accommodate the passage of the blade over the lug for insertion.
 2. The cutting knife of claim 1 wherein the side walls are laterally lanced to provide the resilience for receiving the blade and to tightly engage the blade after insertion.
 3. The cutting knife of claim 2 wherein the upper surface of the lug forms an upwardly sloping ramp to facilitate the assembly of the blade and the blade holder. 